March 30, 2026
A tax extension for 2025 gives you more time to file, not more time to pay, and is requested using IRS Form 4868 for individuals or Form 7004 for many business returns. When filed by the original due date, a valid extension typically grants an extra six months to submit a complete and accurate return.
When your team is facing incomplete K‑1s, delayed investment statements, or new business activities, filing a tax extension can be an effective risk‑management tool. For 2025 individual returns, a timely Form 4868 extends the filing deadline from April 15, 2026, to October 15, 2026. Businesses that qualify use Form 7004 for a similar automatic six‑month extension period.
The IRS treats properly filed extensions as routine. The instructions to 2025 Form 4868 confirm that you do not need to explain why you are requesting more time, and the IRS will only contact you if it denies the request. That flexibility allows finance leaders to focus on the quality of the return instead of rushing to meet a single date.
For many closely held companies, owner and business returns are tightly linked. Partnerships and S corporations often extend using Form 7004 so that their Schedule K‑1s can be finalized before owners file personal returns under Form 4868. Handling both sides in a coordinated way can reduce amended returns and follow‑on correspondence.
From a planning perspective, an extension also keeps the statute of limitations aligned with your comfort level. The audit window generally closes three years after the filing date or extended due date, whichever is later. Electing to file on extension can give you extra time to evaluate elections and disclosures without losing that protection.
For the 2025 tax year, most individual returns are due April 15, 2026; filing Form 4868 by that date extends the deadline to October 15, 2026, while eligible entities can use Form 7004 for a similar six‑month extension, submitted electronically, by mail, or through a tax professional.
The IRS 2025 Form 4868 instructions specify that calendar‑year individuals must file the form by April 15, 2026. Filing by that date secures the automatic six‑month extension. Fiscal‑year filers count six months from their regular due date instead. The form is short, requiring basic identity information and an estimate of 2025 tax liability and payments.
Businesses that file corporate, partnership, or certain information returns generally use Form 7004. According to IRS guidance for Form 7004, the extension request is also automatic if it is timely and complete. Each entity type has its own original due date, so finance leaders should maintain a calendar for C corporations, S corporations, and partnerships to avoid missed filings.
Both forms can be filed electronically. The IRS encourages e‑file and notes in the 2025 Form 4868 instructions that paying electronically and designating the payment as an extension can, in some cases, serve as your extension request without submitting a separate paper form. This can simplify the process when you are making a significant estimated payment.
If your organization works across borders, be aware of special rules. The IRS indicates that some taxpayers who are “out of the country” automatically receive two additional months to file, even without Form 4868, although interest still accrues on unpaid balances. In those situations, an additional extension may be available using Form 4868 or Form 2350, depending on facts.
An extension only delays the filing deadline; interest and late‑payment penalties still apply if taxes are unpaid by April 15, 2026, so executives should treat extensions as a way to improve accuracy, not as a cash‑flow solution.
The 2024 Form 4868 instructions emphasize that the extension does not extend time to pay. If you owe, interest begins after the original due date and continues until the balance is fully paid. The IRS also may assess a late‑payment penalty, typically 0.5 percent per month of unpaid tax, up to 25 percent, unless you can show reasonable cause.
A late filing penalty, usually 5 percent per month of unpaid tax (capped at 25 percent), can apply if a return is filed after the extended deadline. Filing a valid extension significantly reduces this risk, because it converts what would have been a late filing into a timely one. For many organizations, avoiding this penalty is reason enough to extend when information is incomplete.
Strategically, extensions make sense when you are waiting on complex pass‑through K‑1s, reconciling multi‑state activities, or finalizing new equity or debt transactions. Rushing those items often leads to amended returns or inconsistent reporting between entities, which can draw attention.
Extensions are also useful when your accounting team or CPA is fully allocated during peak season. Moving your return to the extension period can allow more thoughtful review of elections, such as bonus depreciation choices or method changes, which can affect cash taxes for several years.
For multi‑entity groups, effective use of extensions requires aligning federal and state deadlines, coordinating owner and entity returns, and tracking pass‑through information so each filing tells a consistent story.
Many privately held groups include a mix of C corporations, S corporations, partnerships, and disregarded entities. Some entities file Form 1120 with a federal extension via Form 7004, while owners file individual returns with extensions using Form 4868. Ensuring that entity extensions are filed before owner extensions avoids situations where a K‑1 is delayed but the owner’s extended deadline approaches.
State income tax rules can add complexity. Some states accept the federal extension automatically, while others require a separate state form or payment. Finance leaders benefit from a matrix of each jurisdiction’s deadlines, filing methods, and payment thresholds, updated annually.
Groups with operations in new states after 2025 should pay particular attention. Registering and filing an extension may be the first signal to a state that your company now has nexus there. Handling that communication deliberately and consistently across states provides a clearer compliance profile.
For nonprofit affiliates or related foundations, federal extensions for Form 990 series returns and related state charity filings must also be coordinated. While these were not the focus of the IRS 4868 and 7004 instructions, similar principles apply: understand due dates, secure timely extensions where needed, and reconcile information flows across entities.
To support a 2025 extension, estimate tax by projecting current‑year income, reconciling payments and withholding, and comparing the result to prior‑year liability so you can pay at least 90 percent of expected tax by April 15, 2026.
The Form 4868 instructions require that you “properly estimate” your 2025 tax liability when you request an extension. Start by updating year‑to‑date financial statements through at least the most recent closed month. Adjust for known year‑end items such as bonus accruals, inventory changes, and major capital additions.
Next, work with your CPA or internal tax team to map book income to taxable income. That includes permanent differences and temporary timing differences, such as depreciation methods and Section 163(j) interest limitations. The goal is a reasonable estimate, not a perfect final number.
Then, compare your estimated tax to payments already made. For individuals, that includes withholding and estimated payments. For entities, include federal and state estimated payments and overpayments applied from the prior year. The 2025 Form 4868 guidance notes that you are generally protected from late‑payment penalties if you pay at least 90 percent of the current‑year tax by the original due date and pay the balance when you file.
Documenting these calculations in a short memo can support your “reasonable cause” position if the IRS later asks how you determined the extension payment. This is particularly important in years with unusual events, such as a significant gain on a sale or a change in ownership structure.
Used thoughtfully, 2025 tax extensions give your CPA or internal tax team time to align elections, entity structure decisions, and state strategies with your broader financial plan, rather than focusing only on the filing deadline.
During the extension period, your advisor can revisit accounting method opportunities, such as revenue recognition or capitalization policies, that may smooth taxable income over multiple years. The additional time also allows for more robust analysis of depreciation strategies, including whether accelerated deductions this year are consistent with lending covenants and future cash‑flow needs.
Pass‑through owners can use the extension window to model different compensation versus distribution strategies, or to evaluate the impact of new state pass‑through entity tax elections. Coordinating those decisions across owners helps avoid inequities and surprises at the individual level.
Finally, extensions create space to confirm that your documentation supports the positions taken. That may include transfer pricing files, research credit studies, or workpapers for significant deductions. A well‑organized file can shorten any future IRS or state inquiry and reduce disruption for your finance team.
As you consider whether a 2025 extension is appropriate, work with a professional who understands your industry and long‑term goals. A thoughtful extension plan can support accurate reporting today and clearer choices for the years ahead.
For additional guidance, contact a member of the Larson Tax Team.
What does a tax extension actually do?
A tax extension gives you additional time—typically six months—to file your return, but it does not extend the deadline to pay any taxes owed.
How do I file a tax extension for 2025?
Individuals file using IRS Form 4868, while businesses typically use IRS Form 7004. Both can be submitted electronically, by mail, or through a tax professional.
What is the deadline to file a 2025 tax extension?
For individuals, the extension must be filed by April 15, 2026, which extends the filing deadline to October 15, 2026. Business deadlines vary but generally follow a similar six-month extension structure.
Will I owe penalties if I file an extension?
Filing an extension avoids late filing penalties, but you may still owe interest and late payment penalties if you don’t pay at least 90% of your tax liability by April 15, 2026.
When is filing a tax extension a smart strategy?
Extensions are beneficial when dealing with incomplete K-1s, complex transactions, multi-state filings, or when additional time is needed for accurate reporting and tax planning decisions.